19728160661696 has 14 divisors (see below), whose sum is σ = 39148068813180. Its totient is φ = 9864080330816.

The previous prime is 19728160661659. The next prime is 19728160661701. The reversal of 19728160661696 is 69616606182791.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154126255106 + ... + 154126255233.

Almost surely, 2^{19728160661696} is an apocalyptic number.

19728160661696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19728160661696 is a deficient number, since it is larger than the sum of its proper divisors (19419908151484).

19728160661696 is an equidigital number, since it uses as much as digits as its factorization.

19728160661696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308252510351 (or 308252510341 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 68.

The spelling of 19728160661696 in words is "nineteen trillion, seven hundred twenty-eight billion, one hundred sixty million, six hundred sixty-one thousand, six hundred ninety-six".